Cooling system for transformers.



Patented 1615..

` C. LEG. FORTESCUE. COOLING SYSTEM FOR TRANSFORMER'S. Agrucrrlon 'FILED-Moy. e. 190s.-

'll/111111111111 /l/ ygmog ATTORNEY WITNESSES q provement in' Cooling Systems for Trans-v nNrrED STATES PATENToEEioE-.f

GEABLES LE G. EonTEScUE, oF WILKINs-EUEG, rENNSYLvANLa, .AssIcfNcia` AE'Y- MESNE ASSIGNMENTS, .To wESTINGHoUSE ELECTRIC a MANUFACTURING COMPANY, E` EAST PITTSBURGH, PENNSYLvAN1A,A coRPonATIoNoE TENNSYLVANIAA COOLING SYSTEM Eon TRANSFORM'E'ES.

To all whom it may concern Beit known that I, CHARLES LEv Gallon-r county of Allegheny and State of PennsyL,

Vania, ,have invented a new'and useful .Imf

, foi-mers, of which thefollowing is a specithe class above indicated, and fluid-circulab- -ingmeans whereby the active parts of theapparatus which are immersed in theinsulating iuid mayv be'more effectually cooled.

Alternating current transformers of large size have frequently been disposed in boiler.-

iron tanks or casesand immersed in oil or. other suitable insulating fluid. During the operation of oil immersed transformers, large quantities of heat aregenerated in its ,A core members and coils, and, in order to reduce the temperature of these parts, cooling coils have often been introduced into the oil near the top of the tank, water or other suitable liquid being continuously passed through the tube or pipe of which the coil is composed. These-coils e'ectually reduce the temperature of the oil in their vicinity but, by reason of the poor heat conducf tivity of thev fluid and its inertia the temperature of the active parts of the transf former is usually considerably higher than the average temperature of the surrounding medium. I

According to my present invention, l pro-k vide a horizontal partition in the tank or casing, in which the transformer is disposed, which divides the interiorof the tankinto two chambers, parts of the transformer being located in each chamber. In addition to the partition referred to, l provide a flange or baiiie plate, which extends almost to the surface of the liquid .in the tank'and Sepa-v rates the oil-immersed coolingV tubes from the remainder of the tank, a large pipe or flue being provided forconnecting the nonl rapid circulation of the insulating fluid within the tank, the simplicity ofthe struc `ture andthe fact that the apparatus is enadjacent chamber of the tank with the isolated portion Qf the fluid which surrounds the cooling tubes. A propeller, which may be driven by any'suitable motor, is located #Specification of-etters Patent. Patented Apri 13,1915, Application led lovembe'r 6, 1908.- Seria1No.461,339.`

in the ipe or lue and causesa circulation of Yinsu ating fluid from the Acooling-lancesv downwardly into the 'lower chamber ofthe tank, from whence the fluid iscoinpelled to pass through Ventilating ductsor-passages, which are established, in the usual manner, between the coils ofthe transformer, into the upper chamber. of theA tank",v

The single figure of the accompanying` drawing is a sectional elevation ofatransformer disposed 1n a tank or casing con st'ructed in accordance with, and providedr wlth the 'attachments of, my invention.

Referring to the drawing, the"-k matter illustrated'compris'es a transformer xcorel A and coils 2,- whch are supported ,byv a hori-l zontal plateor flange 3, that constitutes apartition in `the tank 4 and divides theinterior intotwochambers 5 and 6. The transformer Au'sffcompletely' `immersed inl goil or other Suitable insulating fluid and -a cooling coll 7 1s immersed in the liquid near the t'op of the tank. vThe extremities of the'coolingcoil'are located outside of-the tank vso v that .water or other cooling fluid maybe circulated through the coil.

The cooling coil is partially isolated from thel bod of they liquid in the tank by means of aba e plate 8, which is supported by the which are provided in the usual manner between the coils of thetransformer winding,

said coils being L separated by spacing strips 13.

The motorv ll may be locatedwithin the tank'above the liquid level without departing from the Spirit of my invention, and this arrangement may be preferable in case the A i apparatus is exposed to the weather. The

tirely contained within a single casing are Yzo y only such limitations shall' flie imposed es S Ifloceted adjacent to the end of the pipe which speci'l' adviitages rt'vhichd render infini@ provement desirable and commerclal y 11nmodifications may hef'eiiected WithinVW `the scope of my invention, endl-desire that,V

are indicated the appended claims. I claim as my invetifonf" 1. The combination Within :Huid-contain? ing tank having ahorizonteip'artition-neer one "end which proiiides en upper end e" lower .chamber in seid tank,-azcooling coil immersedin the fluid withinthe upper end of the upper chamber, end acondnit connecting the fluid in the vicnityajoffthe cooling coil with .theuid in thelowerschember, of

z an electric transformer supportedv uponseidh partition and disposed mainly inthe. upper. `chamber, and means located Withineidlcon-l4 ,fgduit for producing@ circulation ofthe fluid vrthrough it bers.;f t.a A

' '-2. The" combinationwith. 13a; luid-eontein-V and the upper and flowerchamj ingtank 'having a horizontal v"partitionwhich .divides said tank'into" an upper andv a; lower I chamber andV provided with ie. passage be' tween the upper ends of.. saidcha-nxbers, and an oilecooling means disposed in the upper end of the upper'fehamberyofan electric transformer' resting upon seid-'partitionand disposedl rneinljiirrtth1e upper chamhr: and means for forcing `oil from'v-thevicinity of' th'oling means through "said passage to thelowzve'r chamber. V- 43'. The combination with efl'Quid-containingtnkff ge partitioniprovided With @two-aperti; s; of a transformer projecting into one of said apertures, a pipe projectin from the other aperture: and e cooling coi is remote from the partition, and a propeller for producing a. `circulation of rliquid through seid pipe and said transformer and through the spaces between the convolutions `of said cooling coil. l

' 4; :The combination with a liquid-containing tank havinge horizontal partition neer rtrensf'ormer resting-'upon said partition and projecting into one of seidepertures, a' pipe projecting upwardly from-'the other apertank, e cooling coilbetween the baiie plate' and the tank Wall,` fand e propeller lfor forc ing liquid through said pipe and seid transconvolutins of the cooling coil.

In testimony whereof, have subscribed my name this 31st day of October-,1908. I .Y

W.- 'M.-MCGNAHEY, Y BmnnYfI-Ixuns.

ture, a baiiie pla-te near the upper endxof the e. FORTES/onli one: 'end provided with two apertures, of a former andsthrough the spaces "between vthe l hereunto 60 

